2 * Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
47 fprintf(stderr, "usage: chkgrp [-q] [groupfile]\n");
52 main(int argc, char *argv[])
60 const char *cp, *f[4], *gfn, *p;
64 while ((opt = getopt(argc, argv, "q")) != -1) {
85 if ((gf = fopen(gfn, "r")) == NULL)
86 err(EX_NOINPUT, "%s", gfn);
88 /* check line by line */
90 if ((line = fgetln(gf, &len)) == NULL)
92 if (len > 0 && line[len - 1] != '\n') {
93 warnx("%s: line %d: no newline character", gfn, n);
96 while (len && isspace(line[len-1]))
99 /* ignore blank lines and comments */
100 for (p = line; p < line + len; p++)
101 if (!isspace(*p)) break;
102 if (!len || *p == '#')
106 * Hack: special case for + line
108 if (strncmp(line, "+:::", len) == 0)
112 * A correct group entry has four colon-separated fields,
113 * the third of which must be entirely numeric and the
114 * fourth of which may be empty.
116 for (i = k = 0; k < 4; k++) {
117 for (f[k] = line + i; i < len && line[i] != ':'; i++)
119 if (k < 3 && line[i] != ':')
125 warnx("%s: line %d: missing field(s)", gfn, n);
131 for (cp = f[0] ; *cp ; cp++) {
132 if (!isalnum(*cp) && *cp != '.' && *cp != '_' &&
133 *cp != '-' && (cp > f[0] || *cp != '+')) {
134 warnx("%s: line %d: '%c' invalid character",
140 for (cp = f[3] ; *cp ; cp++) {
141 if (!isalnum(*cp) && *cp != '.' && *cp != '_' &&
142 *cp != '-' && *cp != ',') {
143 warnx("%s: line %d: '%c' invalid character",
149 /* check if fourth field ended with a colon */
151 warnx("%s: line %d: too many fields", gfn, n);
155 /* check that none of the fields contain whitespace */
156 for (k = 0; k < 4; k++) {
157 if (strcspn(f[k], " \t") != strlen(f[k])) {
158 warnx("%s: line %d: field %d contains whitespace",
164 /* check that the GID is numeric */
165 if (strspn(f[2], "0123456789") != strlen(f[2])) {
166 warnx("%s: line %d: group id is not numeric", gfn, n);
170 /* check the range of the group id */
172 gid = strtoul(f[2], NULL, 10);
174 warnx("%s: line %d: strtoul failed", gfn, n);
175 } else if (gid > GID_MAX) {
176 warnx("%s: line %d: group id is too large (%ju > %ju)",
177 gfn, n, (uintmax_t)gid, (uintmax_t)GID_MAX);
182 /* check what broke the loop */
184 err(EX_IOERR, "%s: line %d", gfn, n);
188 if (e == 0 && quiet == 0)
189 printf("%s is fine\n", gfn);
190 exit(e ? EX_DATAERR : EX_OK);